JP2021006246A - Absorber and absorbent article - Google Patents

Abstract

To provide an absorbent article which is excellent in leakage prevention performance of a leakage prevention cuff and fitness of a leg cuff and can effectively prevent lateral leakage.SOLUTION: A plurality of elastic members 36 are arranged to be able to expand and contract in a lengthwise direction X in a second rising part 35 of a leakage prevention cuff 3, and a plurality of elastic members 42 are arranged to be able to expand and contract in the lengthwise direction X in a leg cuff 41. When the respective lengths in the lengthwise direction of the leakage prevention cuff 3 and the leg cuff 41 are cuff lengthwise direction lengths, and the cuff lengthwise direction lengths in the maximum expanded states of both cuffs 3, 41 are 100, contraction stress per one elastic member 36 of the second rising part 35 in the cuff lengthwise direction length of 70 is small compared to contraction stress per one elastic member 42 of the leg cuff 41 in the cuff lengthwise direction length of 70. Further, the contraction stress of the entire second rising part 35 in the cuff lengthwise direction length of 70 is large compared to the contraction stress of the entire leg cuff 41 in the cuff lengthwise direction length of 70.SELECTED DRAWING: Figure 2

Description

The present invention relates to an absorbent article with a leak-proof cuff and a leg cuff.

Absorbent articles such as disposable diapers are known to have a leak-proof cuff, which is also called a three-dimensional gather or a three-dimensional guard. The leak-proof cuffs are typically arranged on both sides along the vertical direction (the direction corresponding to the front-back direction of the wearer) of the main body of the absorbent article, and extend to the leak-proof cuff forming sheet and the sheet. It is provided with an elastic member fixed in a state, stands up on the skin side of the wearer when the absorbent article is worn, and blocks excrement such as stool to prevent lateral leakage. In addition, the absorbent article provided with the leakage-proof cuff typically further includes a pair of side flap portions extending outward in the lateral direction (direction orthogonal to the vertical direction) from the main body, and the said. A leg cuff including an elastic member fixed in an extended state is provided at a portion of the side flap portion corresponding to the wearer's leg circumference. The leg cuff fits around the wearer's legs, preventing the inconvenience of excrement leaking down the legs.

Patent Documents 1 to 3 include a leak-proof cuff and a leg cuff, and the leak-proof cuff includes a base end portion in which a leak-proof cuff forming sheet is fixed to another member, and the base end portion as a starting point. Described is an absorbent article having an upright portion on which the seat stands on the wearer side. The upright portion described in Patent Documents 1 and 2 is bent at a bent portion extending in the vertical direction, and extends from the outside to the inside in the horizontal direction (direction orthogonal to the vertical direction) from the base end portion to the bent portion. It has an extension portion and an outer extension portion that extends laterally outward from the bent portion and is located closer to the wearer's skin than the inner extension portion. The upright portion described in Patent Document 3 has a T-shape in a cross-sectional view along the lateral direction.

Japanese Unexamined Patent Publication No. 11-285510 Japanese Unexamined Patent Publication No. 2011-50501 Japanese Unexamined Patent Publication No. 2008-307223

Conventional absorbent articles with leak-proof cuffs and leg cuffs have room for improvement in terms of leak-proof cuff leak-proof performance and leg cuff fit. Therefore, an object of the present invention is to provide an absorbent article which is excellent in the leakage prevention performance of the leakage prevention cuff and the fit of the leg cuff and can effectively prevent lateral leakage.

The present invention has an absorbent body having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, and a separating portion is provided between an absorbent body having an absorber and a skin-facing surface of the absorbent body. A pair of vertically extending leak-proof cuffs provided and arranged, a side sheet extending laterally outward from both side edges of the absorber along the vertical direction, and the pair of leak-proof cuffs. An absorbent article comprising a pair of leg cuffs arranged laterally laterally and at a portion corresponding to the wearer's leg circumference.
In one embodiment of the absorbent article of the present invention, each of the pair of leak-proof cuffs is configured to include the side sheet, and the base end portion in which the side sheet is fixed to another member and the base. The side seat has an upright portion that stands up on the wearer side with the end portion as a starting point in the lateral direction.
In one embodiment of the absorbent article of the present invention, the upright portion is bent at the bent portion extending in the vertical direction, and the first upright portion extending from the base end portion to the bent portion and the bent portion. To the free end of the standing portion, including a second standing portion located closer to the wearer's skin than the first standing portion, and a plurality of leak-proof cuffs are formed on the second standing portion. The elastic members for use are arranged side by side in the horizontal direction in a state in which the elastic members can be expanded and contracted in the vertical direction.
In one embodiment of the absorbent article of the present invention, the leg cuff is configured to include the side sheet and a plurality of leg cuff forming elastic members arranged on the side sheet, and the plurality of leg cuff forming elastic members. Are arranged side by side in the horizontal direction in a state where they can be expanded and contracted in the vertical direction at the outer side in the horizontal direction from the base end portion.
In one embodiment of the absorbent article of the present invention, the vertical length of each of the leak-proof cuff and the leg cuff is defined as the vertical length of the cuff, and the vertical length of the cuff in the maximum extension state of both cuffs is defined as the vertical length of the cuff. When it is set to 100, the contraction stress per one elastic member for forming the leak-proof cuff of the second standing portion when the cuff length is 70 is the leg cuff when the cuff length is 70. The contraction stress per leg cuff forming elastic member is smaller than that of the leg cuff, and the total contraction stress of the second upright portion at the cuff vertical length of 70 is 70. It is larger than the total contraction stress of the leg cuff.
Other features, effects and embodiments of the invention are described below.

According to the present invention, there is provided an absorbent article which is excellent in the leakage prevention performance of the leakage prevention cuff and the fit of the leg cuff and can effectively prevent lateral leakage.

FIG. 1 is a developed plan view schematically showing a deployable disposable diaper according to an embodiment of the absorbent article of the present invention, in which the skin-facing surface side (surface sheet side) in the deployed and stretched state is partially broken. .. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 3 is an example of a graph showing the relationship between the vertical length of the cuff and the contraction stress for the entire second standing portion of the leak-proof cuff and the entire leg cuff. FIG. 4 is an example of a graph showing the relationship between the vertical length of the cuff and the contraction stress per elastic member for each of the second standing portion and the leg cuff of the leak-proof cuff. FIG. 5 is an example of a graph showing the relationship between the vertical length of the cuff and the contraction stress for each of the innermost and outermost lateral directions of the leak-proof cuff in the second standing portion.

Hereinafter, the present invention will be described based on the preferred embodiment with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. The drawings are basically schematic, and the ratio of each dimension may differ from the actual one.

1 and 2 show a disposable diaper 1 which is an embodiment of the absorbent article of the present invention. The diaper 1 has a vertical direction X corresponding to the front-back direction of the wearer, that is, a direction extending from the ventral side to the back side via the crotch portion, and a lateral direction Y orthogonal to the vertical direction X, and includes an absorber 23. Along the absorbent body 2, a pair of leak-proof cuffs 3 and 3 extending in the vertical direction X arranged with a separation portion 39 provided on the skin facing surface of the absorbent main body 2, and the absorbent body 23 in the vertical direction X. The side seats 30 extending outward from the side edges 23S and 23S in the lateral direction Y and the pair of leak-proof cuffs 3 and 3 are arranged outside the lateral direction Y and corresponding to the wearer's leg circumference. It includes a pair of leg cuffs 41 and 41. The diaper 1 of the illustrated form is arranged on both sides of the absorbent body 2 in the lateral direction Y, and includes a pair of side flap portions 4 and 4 including a side sheet 30, and a pair of leg cuffs 41, Each of the 41 is arranged in the side flap portion 4.

In the present specification, the "skin facing surface" is a surface of the absorbent article or its constituent members (for example, an absorbent body) that is directed toward the wearer's skin when the absorbent article is worn, that is, relatively of the wearer. The side closer to the skin, the "non-skin facing surface" is the surface of the absorbent article or its constituents that faces the opposite side of the skin when the absorbent article is worn, that is, relatively from the wearer's skin. The distant side. The term "when worn" as used herein means a state in which the normal proper wearing position, that is, the correct wearing position of the absorbent article is maintained.

As shown in FIG. 1, the diaper 1 (absorbent body 2) of the present embodiment has a crotch portion M arranged in the crotch portion of the wearer at the time of wearing and a front portion of the crotch portion M in the vertical direction X, that is, the wearer. It has a ventral portion F arranged on the ventral side of the diaper and a dorsal portion R arranged behind the crotch portion M in the longitudinal direction X, that is, on the dorsal side of the wearer. The inseam M includes an excretion portion facing portion (not shown) that is arranged to face the excretion portion such as the wearer's penis when worn.

The absorbent body 2 includes an absorber 23, a front surface sheet 21 arranged on the skin-facing surface side of the absorber 23, and a back surface sheet 22 arranged on the non-skin-facing surface side of the absorber 23. , These are integrated by a known joining means such as an adhesive. The absorber 23 is interposed between the front surface sheet 21 and the back surface sheet 22, and has a liquid-retaining absorbent core 24 containing a water-absorbent material and an outer surface (skin facing surface and non-skin facing surface) of the absorbent core 24. It is configured to include a core wrap sheet 25 that covers the skin facing surface). The absorbent body 2 of the present embodiment has a rectangular shape in a plan view, extends from the ventral side F to the dorsal side R in the vertical direction X, and the longitudinal direction thereof coincides with the vertical direction X.

As the front surface sheet 21, the back surface sheet 22, and the absorber 23, various types conventionally used for this type of absorbent article can be used without particular limitation. As the surface sheet 21, for example, a liquid-permeable single-layer or multi-layered non-woven fabric or perforated film can be used. The back sheet 22 is a leak-proof sheet, that is, liquid impermeable (property that does not allow liquid to pass through at all) or liquid impermeability (property that does not allow liquid to pass through, although it cannot be said to be liquid impervious). A sheet having the above can be used, for example, a breathable resin film, or a laminate of a resin film and a non-woven fabric can be used. As the absorbent core 24 constituting the absorbent body 23, for example, a fiber stack made by stacking water-absorbent materials such as wood pulp and a water-absorbent polymer, and a sheet-shaped absorbent structure containing the water-absorbent material. Can be used. As the core wrap sheet 25 constituting the absorber 23, a sheet having liquid permeability can be used, and for example, paper or non-woven fabric can be used.

In the present embodiment, as shown in FIG. 2, the front surface sheet 21 covers the entire surface of the absorber 23 facing the skin, and the back surface sheet 22 covers the entire non-skin facing surface of the absorber 23. The 22 further extends outward in the lateral direction Y from the side edges 23S and 23S of the absorber 23, and constitutes the side flap portion 4 together with the side sheet 30. As described above, the side flap portion 4 of the present embodiment is located on both outer sides of the absorber 23 in the lateral direction Y, and includes the front surface sheet 21, the back surface sheet 22, and the side sheet 30. These plurality of members constituting the side flap portion 4 are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal.

At the end of each of the ventral side F and the dorsal side R in the longitudinal direction X, that is, the waist end, elastic members 11 for forming gathers around the waist, which are arranged in a state of being expandable and contractible in the lateral direction Y, are arranged in the lateral direction Y. It extends laterally from the side flap portion 4 on one side to the side flap portion 4 on the other side. The elastic member 11 for forming gathers around the waist is formed in the lateral direction Y between the front surface sheet 21 and the back surface sheet 22 extending outward in the vertical direction X from both ends 23T and 23T of the absorber 23 in the vertical direction X. It is fixed in the extended state. With such a configuration, when the diaper 1 is worn, the waist end is contracted by the contraction force of the elastic member 11 for forming gathers around the waist, and the diaper 1 can be fitted around the waist of the wearer.

The diaper 1 is a so-called deployable disposable diaper, and includes a fastening structure 5 used when worn. As shown in FIG. 1, the fastening structure 5 comprises a pair of fastening tapes 51, 51 arranged on both side edges of the dorsal portion R of the diaper 1 along the vertical direction X, and a ventral portion F of the diaper 1. It is configured to include a target region 53 arranged on a non-skin facing surface (non-skin facing surface of the back sheet 22). The fastening tape 51 is provided with a fastening portion 52, and when the diaper 1 is worn, the fastening portion 52 is fastened to the target area 53. In the target area 53, the fastening portion 52 can be detachably fastened. Typically, the fastening portion 52 is made up of a male member of the mechanical hook-and-loop fastener, and the target region 53 is made up of a female member of the mechanical hook-and-loop fastener.

As shown in FIGS. 1 and 2, each of the pair of leakage-proof cuffs 3 and 3 includes a side sheet 30, and a base end portion 31 in which the side sheet 30 is fixed to another member. The side seat 30 has an upright portion 32 that stands up on the wearer side with the base end portion 31 as a starting point in the lateral direction Y.

As shown in FIGS. 1 and 2, a pair of side sheets 30 are arranged on both sides of the absorbent body 2 on the skin-facing surface facing the skin along the vertical direction X, and between the pair of side sheets 30 and 30. Is provided with a separating portion 39. The separating portion 39 is located at the central portion of the absorbent main body 2 (diaper 1) in the lateral direction Y. Each side sheet 30 is arranged so as to straddle the side edge 23S of the absorber 23 in the lateral direction Y, and is located at a portion overlapping the absorber 23 in a plan view and outside the absorber 23 in the lateral direction Y. The portion and the portion are provided in the lateral direction Y.

As the side sheet 30, a hydrophobic sheet material is used from the viewpoint of surely fulfilling the role of preventing the leakage of body fluid such as urine to the outside. As the hydrophobic sheet material, for example, a hydrophobic non-woven fabric can be used, and specifically, an air-through non-woven fabric, a spunbonded non-woven fabric, an SMS non-woven fabric, a SMMS non-woven fabric, an SMSS non-woven fabric, and the like can be used. , A hydrophobic resin film, a laminate of the resin film and the non-woven fabric, and the like can be used. Here, "S" means a spunbonded non-woven fabric, and "M" means a melt-blown non-woven fabric. The side sheet 30 as a leak-proof cuff forming sheet preferably has a water pressure resistance of 80 mmH2O or more, particularly 100 mmH2O or more, when measured in accordance with ISO 811.

The base end portion 31 is a portion that serves as a standing starting point when the standing portion 32 stands up toward the wearer's skin side when the diaper 1 is worn. More specifically, the base end portion 31 is a portion of the side sheet 30 fixed to the “other member” that is adjacent to the upright portion 32 in the lateral direction Y, in other words, laterally in the fixed portion. This is the innermost part of the direction Y. Further, the "other member" is a member other than the side sheet 30 among the constituent members of the diaper 1, and is typically capable of contacting the side sheet 30 on the non-skin facing surface side of the side sheet 30. In this embodiment, as shown in FIG. 2, the surface sheet 21 is a member arranged in the above.

As described above, the base end portion 31 is a fixing portion between the side sheet 30 and other members, and is typically formed by an adhesive such as hot melt or a known joining means such as heat fusion. .. As shown in FIG. 1, the base end portion 31 of the present embodiment has a linear shape in a plan view, extends in the vertical direction X over substantially the entire length of the vertical direction X of the side sheet 30, and is also shown in FIG. As described above, it is located outside the side edge 23S of the absorber 23 in the lateral direction Y and in the vicinity of the side edge 23S. The plan view shape of the base end portion 31 is not particularly limited, and may be a wavy line, a curved line, a zigzag line, or the like in addition to a straight line, and the base end portion 31 is not continuous in one direction (longitudinal direction X). It may be a breaking line having a structure in which fixed portions and non-fixed portions of the side sheet 30 with other members are alternately arranged in the vertical direction X.

The upright portion 32 is a non-fixed portion of the side sheet 30 with other members, and is bent by a bent portion 33 extending in the vertical direction X as shown in FIGS. 1 and 2, and is bent at a base end portion 31. Includes a first upright portion 34 extending from the bent portion 33 to a second upright portion 35 located closer to the wearer's skin than the first upright portion 34 from the bent portion 33 to the free end 32a of the upright portion 32. It is composed of. The surface of the second standing portion 35 may come into contact with the wearer's skin when wearing the diaper 1.

In the present embodiment, as shown in FIG. 2, the upright portion 32 is bent outward in the lateral direction Y, and the first upright portion 34 constituting the upright portion 32 is laterally bent from the base end portion 31 to the bent portion 33. The second standing portion 35 extending inward from the outside in the direction Y and forming the standing portion 32 extends from the bent portion 33 to the outside in the lateral direction Y. The bent portion 33 is a portion of the standing portion 32 that is closest to the center of the diaper 1 in the lateral direction Y, and has a linear shape extending in the vertical direction X in the unfolded and extended state of the diaper 1 as shown in FIG. The separation portion 39 between the pair of leak-proof cuffs 3 and 3 is a region sandwiched between the bent portion 33 of one leak-proof cuff 3 and the bent portion 33 of the other leak-proof cuff 3. The above-mentioned "diaper 1 (absorbent article) unfolded and stretched state" means that the diaper 1 is in the unfolded state as shown in FIG. 1, and the unfolded state of the diaper 1 is designed by stretching the elastic members of each part. (Same as the dimensions when expanded in a plane with the influence of elastic members completely eliminated). Normally, the upright portion 32 does not stand up and falls down in the unfolded and extended state of the diaper 1, but in FIG. 2, which shows the same state, the upright portion 32 is upright from the viewpoint of easy explanation.

As shown in FIGS. 1 and 2, a plurality of (specifically, four) elastic members 36 for forming leak-proof cuffs are stretchable in the vertical direction X in the second standing portion 35 in the horizontal direction Y. They are arranged side by side. The portion of the second standing portion 35 in which the elastic member 36 for forming a leak-proof cuff is fixed in a state in which it can be expanded and contracted in the vertical direction X has elasticity in the vertical direction X. More specifically, as shown in FIG. 2, the second upright portion 35 is configured to include a portion in which the side sheet 30 is folded in two in the lateral direction Y to form a two-layer structure, and the two-layer structure is formed. A plurality of (4) thread-shaped elastic members 36 for forming leak-proof cuffs are fixed side by side in the horizontal direction Y in a stretched state in the vertical direction X between the two sheets 30 and 30 constituting the above. Each elastic member 36 is arranged in a state where it can be expanded and contracted in the vertical direction X. The free end 32a of the upright portion 32 is located at the fold in half on the side sheet 30. The elastic member 36 for forming a leak-proof cuff is preferably thread-shaped, but may be strip-shaped instead. Further, the number of the elastic members 36 for forming the leakage-proof cuff is not particularly limited as long as it is two or more.

The leak-proof cuff 3 is typically manufactured by fixing the leak-proof cuff forming elastic member 36 to the side sheet 30 in an stretched state and then releasing the stretched state. Due to this, there are many wrinkles on the surface of the second upright portion 35 that can come into contact with the skin of the wearer of the diaper 1. The wrinkles on the surface of the second standing portion 35 are arranged substantially regularly intermittently in the vertical direction X.

The upright portion 32 is preferably present at least in the inseam M. This is because the part of the diaper 1 where excrement is concentrated and lateral leakage is particularly problematic is the inseam M. As shown in FIG. 1, the standing portion 32 of the present embodiment extends over the entire length of the crotch portion M in the longitudinal direction X, and further extends to both the ventral side portion F and the dorsal side portion R.

As shown in FIG. 1, standing blocking portions 37 are formed on both outer sides of the standing portions 32 of the pair of leak-proof cuffs 3 and 3 in the vertical direction X. The upright portion 32 is sandwiched between an upright inhibition portion 37 on one end side (ventral side F side) and an upright inhibition portion 37 on the other end side (dorsal side R side) in the longitudinal direction X. In the standing-inhibiting portion 37, a portion of the side sheet 30 that exists at the same position as the standing portion 32 (that is, a non-fixed portion with another member) in the lateral direction Y overlaps with the absorber 23 in a plan view. It is fixed to the member (the surface sheet 21 in the present embodiment) so that the standing portion 37 does not stand even if the standing portion 32 stands up.

When the diaper 1 is worn, the standing portions 32 (first standing portion 34 and second standing portion 35) of each of the pair of leak-proof cuffs 3 and 3 are arranged in the second standing portion 35 to form an elastic member for forming a leak-proof cuff. Due to the contraction force of 36, the base end portion 31 stands up as shown in FIG. 2, thereby at least on both sides of the absorbent body 2 in the inseam M along the vertical direction X of the skin-facing surface. A pair of leak-proof walls composed of the upright portions 32 are formed. This pair of leak-proof walls blocks excrement such as urine and feces excreted on the skin-facing surface of the diaper 1 and prevents the excrement from leaking to the outside of the diaper 1 in the lateral direction Y, so-called lateral leakage. To do.

Further, when the diaper 1 is worn, the central portion (the portion including the inseam M) of the diaper 1 which is the arrangement portion of the elastic member 36 is not formed due to the contraction force of the elastic member 36 for forming the leak-proof cuff. The diaper 1 is curved so as to be convex on the skin-facing surface side (back surface sheet 22 side), in other words, concave on the skin-facing surface side (front surface sheet 21 side). In this way, the diaper 1 is transformed into a boat shape as a whole. Since such a boat-shaped diaper 1 easily follows the shape of the crotch portion of the wearer, the second standing portion 35 of the standing portion 32 in the standing state of the diaper 1 fits well to the wearer's skin and adheres to the skin. As a result, the lateral leakage prevention function of the leakage prevention cuff 3 can be effectively exhibited.

Each of the pair of leg cuffs 41 and 41 includes a side sheet 30 and a plurality of leg cuff forming elastic members 42 arranged on the side sheet 30. As shown in FIG. 2, the leg cuff 41 of the present embodiment is further configured to include a back surface sheet 22, and also includes two thread-like elastic members 42 for forming the leg cuff. A plurality of (two) thread-shaped elastic members 42 for forming leg cuffs are expandable and contractable in the vertical direction X outside the base end portion 31 of the leakage-proof cuff 3, which will be described later, in the horizontal direction Y. They are arranged side by side. Each of the plurality of leg cuff forming elastic members 42 is extended in the vertical direction X over the entire length of the vertical direction X of the inseam M, and becomes a sheet-like member constituting the side flap portion 4 such as the side sheet 30. By being fixed, it is in a state where it can be expanded and contracted in the vertical direction X. With such a configuration, when the diaper 1 is worn, the leg cuff 41 contracts due to the contraction force of the leg cuff forming elastic member 42, and can fit around the wearer's legs. The elastic member 42 for forming the leg cuff is preferably thread-shaped, but may be strip-shaped instead. Further, the number of elastic members 42 for forming leg cuffs is not particularly limited as long as it is two or more.

In the diaper 1, the length of each of the leak-proof cuff 3 (second standing portion 35) and the leg cuff 41 in the vertical direction X is referred to as the "cuff vertical length", and both cuffs 3 and 41 are in the maximum extended state. When the length of the cuff in the vertical direction is 100, it is characterized by satisfying both (A) and (B) below. In this way, the "cuff vertical length" is the relative vertical length of the cuff based on the vertical length of the cuff in the maximum extended state, and is typically the said. It is the shortest when the cuff is in the natural state (when no external force is applied), but it does not become zero.

(A) The contraction stress σ ₇₀ 35 per one elastic member 36 for forming a leak-proof cuff of the second standing portion 35 at a cuff vertical length of 70 is the leg cuff 41 at a cuff vertical length of 70. It is smaller than the contraction stress σ ₇₀ 41 per leg cuff forming elastic member 42.
(B) The total contraction stress σ ₇₀ 35W of the second standing portion 35 when the cuff length is 70 is larger than the total contraction stress σ ₇₀ 41W of the leg cuff 41 when the cuff length is 70. ..
Each of the above-mentioned contraction stresses is measured by the following method using a measurement sample prepared by the following method.

<Preparation of measurement sample>
First, the diaper 1 (absorbent article) is cut over the entire length of the vertical direction X so as to include two types of cuffs (leakage-proof cuff 3 (second standing portion 35), leg cuff 41) to be contrasted, and the first section is formed. To get. The cutting for obtaining this first section may be performed, for example, by bisecting the diaper 1 in the lateral direction Y. In the first section, when the second standing portion 35 (the portion extending from the bent portion 33 to the free end 32a) of the leakage-proof cuff 3 and the second standing portion 35 are virtually extended outward in both the vertical directions X. (In the diaper 1 shown in FIG. 1, the standing-inhibiting portion 37) and the extending region when the leg cuff 41 and the second standing portion 35 are virtually extended to both outer sides in the vertical direction X are included.
Next, in the first section, a portion in which the elastic members (elastic member 36 for forming a leak-proof cuff, elastic member 42 for forming a leg cuff) are arranged in an elongated state in the vertical direction X is cut, and in an expanded and extended state. A second section having a rectangular shape in a plan view having a length of 100 mm in the vertical direction X is obtained. The second section is a portion of the diaper 1 that has elasticity in the longitudinal direction X, and is typically a portion located at the inseam M.
Then, the second section is cut in the lateral direction Y along each of the plurality of elastic members arranged in the second section, and the same number of measurement samples as the number of elastic members included in the second section are obtained. obtain. Each of the plurality of measurement samples obtained in this manner includes one elastic member (leakage-proof cuff forming elastic member 36 or leg cuff forming elastic member 42) and a sheet to which the elastic member is fixed, and is longitudinal. The directional length (length of the vertical direction X) is 100 mm. This sheet is a side sheet 30 when the elastic member included in the measurement sample is the leak-proof cuff forming elastic member 36 when the second section is cut from the diaper 1 shown in FIG. When the elastic member included in the measurement sample is the leg cuff forming elastic member 42, it is the side sheet 30 and the back surface sheet 22.

<Measurement method of contraction stress>
Longitudinal direction of the measurement sample By sandwiching both ends of the Tencilon universal testing machine (RTC-1210A) manufactured by ORIENTEC Co., Ltd. between the chucks and widening the distance between the chucks at a speed of 300 mm / min, the measurement sample can be spread in the longitudinal direction (RTC-1210A). After stretching in the vertical direction X) until the maximum stretching state is reached, the distance between the chucks is narrowed at a speed of 300 mm / min to shrink the measurement sample to a predetermined length, and the stress (shrinking stress) (unit) at that time. : N) is measured. As described above, the stresses σ ₇₀ 35 and σ ₇₀ 41 to be measured are contraction stresses having a length of 70 when the length in the vertical direction of the cuff in the maximum extension state is 100, respectively. In the measurement, the measurement sample is contracted from the maximum extension state corresponding to the cuff vertical length 100 to the length corresponding to the cuff vertical length 70. The contraction stress was measured by the above method for each of a plurality of measurement samples prepared from the leakage-proof cuff 3 (second standing portion 35), and the average value of the plurality of measured values was set to "shrinkage stress σ ₇₀ 35" (cuff vertical direction). The contraction stress per one of the leak-proof cuff forming elastic members 36 of the second upright portion 35 at a length of 70), and the sum of the plurality of measured values is "contraction stress σ ₇₀ 35 W" (cuff longitudinal length). The total contraction stress of the second standing portion 35 at 70). Further, the stress is measured for each of the plurality of measurement samples prepared from the leg cuff 41 by the above method, and the average value of the plurality of measured values is "contraction stress σ ₇₀ 41" (the leg cuff 41 having a length 70 in the vertical direction of the cuff). The contraction stress per leg cuff forming elastic member 42), and the sum of the plurality of measured values is defined as “stress σ ₇₀ 41 W” (the total contraction stress of the leg cuff 41 at the cuff longitudinal length 70).

For example, in the form shown in FIG. 2, four elastic members 36 for forming a leak-proof cuff are arranged on the second standing portion 35, and therefore, four elastic members 36 from the second standing portion 35 are arranged by the above method. By preparing four measurement samples corresponding to the above, measuring the contraction stress at a length corresponding to the cuff longitudinal length 70 of each of the four measurement samples, and calculating the average value of the four measurement values. The contraction stress σ ₇₀ 35 is obtained, and the contraction stress σ ₇₀ 35 W can be obtained by adding up the four measured values. Further, in the form shown in FIG. 2, since two elastic members 42 for forming leg cuffs are arranged on the leg cuff 41, two measurement samples corresponding to the two elastic members 42 from the leg cuff 41 by the above method. , And the contraction stress at the length corresponding to the cuff longitudinal length 70 of each of the two measurement samples is measured, and the contraction stress σ ₇₀ 41 is obtained by calculating the average value of the two measurement values. The contraction stress σ ₇₀ 41 W can be obtained by summing the two measured values.

As described above, each of the above stresses (σ ₇₀ 35, σ ₇₀ 35 W, σ ₇₀ 41, σ ₇₀ 41 W) is in the maximum extension state of the cuff (second standing portion 35 of the leakage-proof cuff 3, leg cuff 41). When the length of the vertical direction X (the vertical length of the cuff) is 100, the contraction stress when the vertical length of the cuff is 70. This "length of the cuff 70" is It corresponds to the average longitudinal length of the leak-proof cuff and leg cuff when wearing this type of absorbent article (disposable diaper). The reason why each of the above stresses is not the stress in the process of extending the cuff (elongation stress) but the stress in the process of contracting the cuff from the maximum extension state (contraction stress) is This is because the operation performed by the person who intends to wear the diaper is taken into consideration. That is, when the diaper is worn, each part of the diaper is usually stretched and then fitted to the body shape. Therefore, the diaper changes from the stretched state to the contracted state, and the measurement is performed in order to respond to the change in the state of the diaper when the diaper is worn. In the method, the measurement sample was changed from the stretched state to the contracted state, and the contraction stress in the process was measured.

The technical significance of the magnitude relationship of "shrinkage stress σ ₇₀ 35 <shrinkage stress σ ₇₀ 41" defined in (A) above is mainly the prevention of forming the second standing portion 35 in contact with the skin of the wearer of the diaper 1. By suppressing the contraction stress (σ ₇₀ 35) per one of the leak cuff forming elastic members 36, it is possible to prevent the skin of the wearer of the diaper 1 from being marked by the tightening of the elastic members 36. However, if the contraction stress of the second standing portion 35 as a whole is lowered more than necessary, it becomes difficult for the second standing portion 35 to fit the wearer's skin, and the lateral leakage prevention performance of the leak-proof cuff 3 is lowered. It leads to. Therefore, in the diaper 1, in addition to the above (A), the above (B) is further satisfied. That is, by establishing the shrinkage stress σ ₇₀ 35 <shrinkage stress σ ₇₀ 41, the shrinkage stress σ ₇₀ 35W> shrinkage stress while making it difficult for the wearer's skin to be marked by tightening the leakage-proof cuff forming elastic member 36. By establishing σ ₇₀ 41W, the contraction stress of the second standing portion 35 as a whole was prevented from being lowered too much. Therefore, according to the diaper 1, the second standing portion 35 of the leak-proof cuff 3 has an appropriate tightening strength that does not leave a mark of the elastic member 36 for forming the leak-proof cuff when worn, and fits the wearer's skin. Since it adheres well, lateral leakage is effectively prevented.

Further, as shown in FIG. 2, when the leak-proof cuff 3 wears the diaper 1, the first standing portion 34 extends from the base end portion 31 to the bent portion 33 from the outside to the inside in the lateral direction Y, and the second standing portion 34. In the case where the 35 extends outward from the bent portion 33 in the lateral direction Y, it has the following features by satisfying the above (A) and (B). That is, according to such a form, when the vertical length of the cuff is 70, the contraction stress of the leg cuff 41 becomes difficult to work so as to shrink the leak-proof cuff 3, so that the standing property of the leak-proof cuff 3 is lowered. Inconveniences such as irregular wrinkles are less likely to occur in the upright portion 35, and as a result, the adhesion of the second upright portion 35 to the wearer's skin is likely to be maintained, and lateral leakage of excrement fluid is further increased. Can be effectively prevented.

Further, when the length of the cuff is 70 in the vertical direction, as shown in FIG. 2 when the diaper 1 is worn, the cuff is for forming a leak-proof cuff located on the outermost side of the lateral direction Y in the second standing portion 35 of the leak-proof cuff 3. It is preferable that the elastic member 36b is located inside the lateral direction Y rather than the plurality of leg cuff forming elastic members 42 located at the innermost side in the lateral direction Y (indicated by reference numeral 42a in the drawing). The positional relationship of the elastic members 36b, 42a referred to here is the same side when the elastic members 36b, 42a divide the diaper 1 into two equal parts in the lateral direction (for example, the diaper 1 shown in FIG. 2). This is the case when it is located on the right side or the left side with the center of the lateral direction Y as the boundary. With such a configuration, when the length in the vertical direction of the cuff is 70, the contraction stress per elastic member is higher in the leg cuff forming elastic member 42 than in the leak-proof cuff forming elastic member 36, that is, Even if the diaper 1 satisfies the above (A), the influence of the (A) on the standing property of the first standing portion 34 of the leak-proof cuff 3 is further suppressed, so that the above (A) and (B) are used. In addition to the action and effect, the adhesion between the wearer's skin and the leak-proof cuff 3 can be easily maintained, and the effect of preventing lateral leakage of the excrement liquid can be achieved more effectively.

FIG. 3 shows an example of a graph showing the relationship between the vertical length of the cuff and the contraction stress (σ35W, σ41W) for the entire second standing portion 35 of the leakage-proof cuff 3 and the entire leg cuff 41. .. In the present invention, as defined in (B) above, regarding the overall contraction stress of the cuffs 3 and 41, when at least the length in the vertical direction of the cuff is 70, "the contraction stress of the second standing portion 35> the contraction stress of the leg cuff 41". It suffices if the magnitude relationship of "shrinkage stress" is established. On the other hand, in the example shown in FIG. 3, such a magnitude relationship is always established regardless of the length of the cuff in the vertical direction. In the present invention, the magnitude relationship of the contraction stress is as shown in the graph shown in FIG. 3, that is, not only when the cuff longitudinal length is 70 but also in other cases, "contraction stress σ ₇₀ 35W> contraction stress". A form in which "σ ₇₀ 41 W" is established is included.

The ratio of the contraction stress σ ₇₀ 35 to the contraction stress σ ₇₀ 41 (σ ₇₀ 35 / σ ₇₀ 41) is preferably 0.2 or more, more preferably 0.3 or more, and preferably 0.99 or less, more preferably. Is less than or equal to 0.9.
The shrinkage stress σ ₇₀ 35 (shrinkage stress per one elastic member 36 for forming a leak-proof cuff of the second standing portion 35 at the length 70 in the vertical direction of the cuff) is preferably 0.03 N or more, more preferably 0. It is 06 N or more, preferably 0.15 N or less, and more preferably 0.12 N or less.
The shrinkage stress σ ₇₀ 41 (shrinkage stress per leg cuff forming elastic member 42 of the leg cuff 41 at the length 70 in the vertical direction of the cuff) is preferably 0.04 N or more, more preferably 0.08 N or more, and It is preferably 0.24 N or less, more preferably 0.20 N or less.

The ratio of the shrinkage stress σ ₇₀ 35W to the shrinkage stress σ ₇₀ 41W (σ ₇₀ 35W / σ ₇₀ 41W) is preferably more than 1, more preferably 1.25 or more, and preferably 6 or less, more preferably 5 or less. is there.
The contraction stress σ ₇₀ 35W (the total contraction stress of the second standing portion 35 at the length 70 in the vertical direction of the cuff) is preferably 0.1 N or more, more preferably 0.2 N or more, and preferably 0.6 N or less. , More preferably 0.5 N or less.
The shrinkage stress σ ₇₀ 41W (the total shrinkage stress of the leg cuff 41 at the cuff longitudinal length 70) is preferably 0.05 N or more, more preferably 0.1 N or more, and preferably 0.5 N or less, more preferably. Is 0.4 N or less.

Satisfying both (A) and (B) is the type (composition of forming material), thickness, elongation rate, and joint length of the elastic member 36 for forming a leak-proof cuff and the elastic member 42 for forming a leg cuff. It is possible by making one or more different types such as (the length of a portion of the elastic member joined to another member by an adhesive or the like). As an example of the configuration satisfying the shrinkage stress σ ₇₀ 35 <shrinkage stress σ ₇₀ 41, the diameter of the leak-proof cuff forming elastic member 36 is smaller than that of the leg cuff forming elastic member 42. Then, in order to satisfy the contraction stress σ ₇₀ 35W> contraction stress σ ₇₀ 41W in such a configuration, the number of arrangements of the leakage-proof cuff forming elastic members 36 in the second standing portion 35 is set, and the leg cuff forming elastic members in the leg cuff 41 are arranged. It may be more than the number of arrangements of 42. In the form shown in FIG. 2, for forming the leakage-proof cuff of the second standing portion on both one side and the other side with reference to a virtual center line (not shown) that bisects the diaper 1 in the lateral direction Y. While the number of elastic members arranged is 4, the number of arranged elastic members for forming leg cuffs is 2, and the former is larger than the latter.

In addition to satisfying both (A) and (B), when the cuff vertical length is in the range of less than the specific value and in the range where the cuff vertical length exceeds the specific value and is 100 or less. The magnitude relationship between the contraction stress σ35 per piece of the leak-proof cuff forming elastic member 36 of the second standing portion 35 and the contraction stress σ41 per leg cuff forming elastic member 42 of the leg cuff 41. Is preferably different. That is, when the cuff vertical length is in the range of 0 or more and less than a specific value, the magnitude relationship of "shrinkage stress σ35 <shrinkage stress σ41" or "shrinkage stress σ35> shrinkage stress σ41" is established, and the cuff vertical length is long. When the value exceeds the specific value and is in the range of 100 or less, it is preferable that the magnitude relationship opposite to that when the cuff vertical length is in the range of 0 or more and the specific value or less is established. With such a configuration, when the cuff vertical length is relatively small, the leak-proof cuff 3 (second standing portion 35) and the leg cuff 41, which has a relatively large contraction stress, contracts first and the wearer wears it. It comes into close contact with the skin with good fit, and in combination with the action and effect of satisfying both (A) and (B), lateral leakage can be prevented more effectively.

In particular, when the cuff vertical length is within a range less than a specific value (that is, when the cuff vertical length is relatively small), the magnitude relationship of "shrinkage stress σ35> shrinkage stress σ41" is established, and the cuff vertical direction When the length exceeds a specific value and is in the range of 100 or less (that is, when the cuff vertical length is relatively large), it is preferable that the magnitude relationship of "shrinkage stress σ35 <shrinkage stress σ41" is established. The graph shown in FIG. 4 is an example of such a preferable form. In the graph shown in FIG. 4, both the contraction stress σ35 per elastic member of the second standing portion 35 of the leakage-proof cuff 3 and the contraction stress σ41 per elastic member of the leg cuff 41 are accompanied by an increase in the amount of elongation. However, the rate of increase is different between the two. Specifically, since the contraction stress σ35 has a small slope of the graph and a small increase rate, the value of the contraction stress σ35 does not increase significantly even if the length in the vertical direction of the cuff is greatly increased. In contrast, since the contraction stress σ41 has a large slope of the graph and a large increase rate, the value of the contraction stress σ41 also greatly increases when the length in the vertical direction of the cuff is greatly increased. As a result, when the cuff vertical length is a specific value Q, the values of the contraction stress σ35 and the contraction stress σ41 match, and when the cuff vertical length is larger than that, the magnitude of the contraction stress σ35 and the contraction stress σ41 becomes large or small. The relationship is reversed, and the contraction stress σ41 becomes larger than the contraction stress σ35. Since the contraction stress σ35 and the contraction stress σ41 are in a relationship as shown in FIG. 4, the second standing portion 35 contracts before the leg cuff 41, and as a result, the leakage-proof cuff 3 (standing portion 32) ) Is improved, and the leg cuff 41 can fit around the wearer's legs with good fit.

When the contraction stress σ35 and the contraction stress σ41 satisfy the relationship as shown in FIG. 4, the magnitude relationship between the contraction stress σ35 and the contraction stress σ41 is reversed, and the specific value Q of the cuff longitudinal length (shrinkage stress σ35 and contraction stress) The cuff vertical length) when the values with σ41 match is preferably less than 70. As a result, the action and effect of satisfying both (A) and (B) can be more reliably achieved. The specific value Q is preferably a numerical value in the range of 30 or more and 69 or less, and more preferably a numerical value in the range of 40 or more and 60 or less.

As an example of a form in which the contraction stress σ35 and the contraction stress σ41 satisfy the relationship as shown in FIG. 4, “The leak-proof cuff forming elastic member 36 has a smaller diameter and a higher elongation rate than the leg cuff forming elastic member 42. Form ”. In such a form, the ratio of the diameter of the leak-proof cuff forming elastic member 36 to the diameter of the leg cuff forming elastic member 42 (diameter of the elastic member 36 / diameter of the elastic member 42) is preferably 0.2 or more. It is preferably 0.3 or more, preferably 0.9 or less, and more preferably 0.8 or less.

When the cuff vertical length is 70, among a plurality of (four in this embodiment) leak-proof cuff forming elastic members 36 in the second standing portion 35, those located at the innermost side in the lateral direction Y ( The contraction stress σ ₇₀ 35a of the portion (hereinafter, also referred to as “the innermost portion of the second standing portion”) corresponding to the portion (indicated by reference numeral 36a in the figure) is the plurality of leakage-proof cuffs in the second standing portion 35. The portion (hereinafter, also referred to as "the outermost portion of the second standing portion") corresponding to the elastic member 36 for forming, which is located on the outermost side in the lateral direction Y (indicated by reference numeral 36b in the figure). It is preferable that the shrinkage stress σ ₇₀ 35b is equal to or larger than that. Here, the "portion corresponding to the elastic member 36a or 36b for forming a leak-proof cuff in the second standing portion 35" means a portion of the second standing portion 35 that overlaps with the elastic member 36a or 36b in a plan view. .. As described above, when the cuff vertical length is 70 in the second standing portion 35, the elastic member 36a for forming the leak-proof cuff located in the innermost portion of the second standing portion (innermost in the horizontal direction Y). The contraction stress σ ₇₀ 35a of the arrangement portion) is equivalent to the contraction stress σ ₇₀ 35b of the outermost portion of the second standing portion (the arrangement portion of the elastic member 36b for forming the leak-proof cuff located on the outermost side in the lateral direction Y). As a result, the entire second standing portion 35 comes into surface contact with the wearer's skin, and the fit of the leak-proof cuff 3 can be further improved.

FIG. 5 shows the cuff vertical direction for each of the innermost portion of the second standing portion (the portion overlapping the elastic member 36a in a plan view) and the outermost portion of the second standing portion (the portion overlapping the elastic member 36b in a plan view). An example of a graph showing the relationship between the length and the contraction stress (σ35a, σ35b) is shown. As described above, when the cuff vertical length is at least 70, the magnitude relationship of "shrinkage stress σ35a of the innermost part of the second standing part ≥ contraction stress σ35b of the outermost part of the second standing part" is established. However, as in the example shown in FIG. 5, it is more preferable that such a magnitude relationship is always established regardless of the length of the cuff in the vertical direction.

The ratio of the shrinkage stress σ ₇₀ 35a to the shrinkage stress σ ₇₀ 35b (σ ₇₀ 35a / σ ₇₀ 35b) is preferably 1 or more, more preferably 1.05 or more, and preferably 3 or less, more preferably 2 or less. is there.
Shrinkage stress σ ₇₀ 35a (shrinkage of a portion of a plurality of leakage-proof cuff-forming elastic members 36 in the second standing portion 35 having a length 70 in the vertical direction of the cuff, which is located in the innermost direction in the lateral direction Y. The stress) is preferably 0.03 N or more, more preferably 0.06 N or more, and preferably 0.15 N or less, more preferably 0.12 N or less.
Shrinkage stress σ ₇₀ 35b (shrinkage of a portion of a plurality of leakage-proof cuff-forming elastic members 36 in the second standing portion 35 at a length of 70 in the vertical direction of the cuff, which is located on the outermost side in the lateral direction Y. The stress) is preferably 0.02N or more, more preferably 0.05N or more, and preferably 0.14N or less, more preferably 0.11N or less.

Although the present invention has been described above, the present invention is not limited to the above-described embodiment and can be appropriately modified without departing from the spirit of the present invention.
For example, in the diaper 1 shown in FIG. 2, the leak-proof cuff 3 is folded outward (the first standing portion 34 extends from the base end portion 31 to the bent portion 33 from the outside to the inside in the lateral direction Y, and the second standing portion 35. Was in the form of extending outward from the bent portion 33 in the lateral direction Y), but the leak-proof cuff 3 was in the form of inward folding (the first standing portion 34 laterally extends from the base end portion 31 to the bent portion 33). The second standing portion 35 may extend from the inside of the direction Y to the outside, and the second standing portion 35 may extend from the bent portion 33 to the inside of the lateral direction Y). However, as described above, it is preferable that the leak-proof cuff 3 is in the outer folded form because the effect peculiar to such a form is exhibited.
The absorbable article of the present invention broadly includes articles used for absorbing body fluids (urine, menstrual blood, loose stool, sweat, etc.) discharged from the human body, and other than the deployable disposable diaper as in the above embodiment, for example, It may include pants-type disposable diapers, urine absorbing pads, sanitary napkins, sanitary shorts, and the like. The following additional notes are further disclosed with respect to the embodiments of the present invention.

<1>
It has a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, and is arranged so as to provide a separation portion between an absorbent body having an absorber and a skin-facing surface of the absorbent body. A pair of leak-proof cuffs extending in the vertical direction, side sheets extending outward in the lateral direction from both side edges of the absorber along the vertical direction, and a pair of leak-proof cuffs extending in the lateral direction. It is an absorbent article provided with a pair of leg cuffs arranged at a portion corresponding to the wearer's leg circumference.
Each of the pair of leak-proof cuffs includes the side sheet, and the side sheet is fixed to another member at a base end portion, and the side sheet is on the wearer side starting from the base end portion. It has an upright portion that stands up in the horizontal direction.
The upright portion is bent at the bent portion extending in the vertical direction, and the first upright portion extending from the base end portion to the bent portion and the first standing portion extending from the bent portion to the free end of the standing portion. A state in which a second standing portion located closer to the wearer's skin than the standing portion is included, and a plurality of leakage-proof cuff forming elastic members can be expanded and contracted in the vertical direction in the second standing portion. They are arranged side by side in the horizontal direction.
The leg cuff is configured to include the side sheet and a plurality of leg cuff forming elastic members arranged on the side sheet, and the plurality of leg cuff forming elastic members are laterally outside the base end portion. They are arranged side by side in the horizontal direction in a state where they can be expanded and contracted in the vertical direction.
When the vertical length of each of the leak-proof cuff and the leg cuff is defined as the vertical length of the cuff, and the vertical length of the cuff in the maximum extension state of both cuffs is 100.
The contraction stress per one of the leak-proof cuff forming elastic members of the second standing portion when the cuff vertical length is 70 is the leg cuff forming elasticity of the leg cuff when the cuff vertical length is 70. The contraction stress is smaller than the contraction stress per member, and the total contraction stress of the second upright portion when the cuff length is 70 is the total contraction stress of the leg cuff when the cuff length is 70. Absorbent article that is large compared to shrinkage stress.
<2>
The ratio of the shrinkage stress per leg cuff forming elastic member having a cuff longitudinal length of 70 to the shrinkage stress per cuff longitudinal length of 70. However, the absorbent article according to <1>, wherein the amount is 0.2 or more and 0.99 or less, preferably 0.3 or more and 0.9 or less.
<3>
The contraction stress per elastic member for forming a leak-proof cuff at a cuff longitudinal length of 70 is 0.03N or more and 0.15N or less, preferably 0.06N or more and 0.12N or less. The absorbent article according to 1> or <2>.
<4>
The contraction stress per leg cuff forming elastic member having a cuff longitudinal length of 70 is 0.04 N or more and 0.24 N or less, preferably 0.08 N or more and 0.20 N or less. The absorbent article according to any one of ~ <3>.

<5>
The ratio of the total shrinkage stress of the second upright portion when the cuff vertical length is 70 to the total shrinkage stress of the leg cuff when the cuff vertical length is 70 is more than 1 and preferably 6 or less. The absorbent article according to any one of <1> to <4>, which is 1.25 or more and 5 or less.
<6>
The total contraction stress of the second standing portion when the cuff vertical length is 70 is 0.1 N or more and 0.6 N or less, preferably 0.2 N or more and 0.5 N or less. 5> The absorbent article according to any one of.
<7>
The contraction stress of the entire leg cuff at a length of 70 in the vertical direction of the cuff is 0.05 N or more and 0.5 N or less, preferably 0.1 N or more and 0.4 N or less, as described in <1> to <6>. The absorbent article according to any one.
<8>
The absorbent article according to any one of <1> to <7>, wherein the number of the elastic members for forming a leak-proof cuff in the second standing portion is larger than the number of elastic members for forming a leg cuff.
<9>
The leak-proof cuff of the second standing portion when the cuff vertical length is in the range of less than a specific value and when the cuff vertical length is in the range of 100 or less exceeding the specific value. The absorbency according to any one of <1> to <8>, wherein the magnitude relationship between the contraction stress per one elastic member for forming and the contraction stress per one elastic member for forming the leg cuff of the leg cuff is different. Goods. <10>
The absorbent article according to <9>, wherein the special value is less than 70, preferably 30 or more and 69 or less, and more preferably 40 or more and 60 or less.
<11>
The ratio of the diameter of the leak-proof cuff forming elastic member of the second standing portion to the diameter of the leg cuff forming elastic member is 0.2 or more and 0.9 or less, preferably 0.3 or more and 0.8 or less. The absorbent article according to any one of <1> to <10>.

<12>
When the length of the cuff in the vertical direction is 70, the contraction stress of the portion of the second standing portion corresponding to the innermost elastic member for forming a leak-proof cuff in the lateral direction is the said. The above <1> to <, which are equal to or greater than the contraction stress of the portion of the second upright portion corresponding to the portion of the plurality of elastic members for forming leak-proof cuffs located on the outermost side in the lateral direction. 11> The absorbent article according to any one of.
<13>
The plurality of leak-proof cuffs are formed in the second standing portion against the contraction stress of the portion of the plurality of elastic members for forming leak-proof cuffs in the second standing portion corresponding to those located at the outermost side in the lateral direction. The absorption according to <12> above, wherein the ratio of the shrinkage stress of the portion of the elastic member for which is located in the innermost direction in the lateral direction is 1 or more and 3 or less, preferably 1.05 or more and 2 or less. Sex goods.
<14>
The contraction stress of the portion of the second upright portion corresponding to the plurality of elastic members for forming leak-proof cuffs located in the innermost direction in the lateral direction is 0.03 N or more and 0.15 N or less, preferably 0. The absorbent article according to <12> or <13>, which is 06N or more and 0.12N or less.
<15>
The contraction stress of the portion of the second standing portion corresponding to the plurality of elastic members for forming leak-proof cuffs located on the outermost side in the lateral direction is 0.02N or more and 0.14N or less, preferably 0. The absorbent article according to any one of <12> to <14>, which is 05N or more and 0.11N or less.
<16>
The first standing portion extends from the base end portion to the bent portion in the lateral direction from the outside to the inside, and the second standing portion extends from the bent portion to the outside in the lateral direction. > To the absorbent article according to any one of <15>.
<17>
When the cuff vertical length is 70, among the plurality of leakage-proof cuff-forming elastic members in the second standing portion, the one located on the outermost side in the lateral direction is the plurality of leg cuff-forming elastic members. The absorbent article according to <16>, which is located inside the lateral direction rather than the innermost one in the lateral direction.

1 Disposable diapers (absorbent articles)
F Ventral part M Crotch part R Back side 2 Absorbent body 21 Front surface sheet 22 Back sheet 23 Absorbent 3 Leakage-proof cuff 30 Side sheet 31 Base end 32 Standing part 32a Free end of standing part 33 Bending part 34 1st Standing part 35 Second standing part 36, 36a, 36b Leakage-proof cuff forming elastic member 37 Standing obstructing part 39 Separation part 4 Side flap part 41 Leg cuff 42, 42a Leg cuff forming elastic member 5 Fastening structure X Vertical direction Y Lateral direction

Claims (9)

It has a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, and is arranged so as to provide a separation portion between an absorbent body having an absorber and a skin-facing surface of the absorbent body. A pair of leak-proof cuffs extending in the vertical direction, side sheets extending outward from the lateral edges of the absorber along the vertical direction, and a pair of leak-proof cuffs extending laterally. It is an absorbent article having a pair of leg cuffs arranged at a portion corresponding to the wearer's leg circumference.
Each of the pair of leakage-proof cuffs includes the side sheet, and the side sheet is fixed to another member at a base end portion, and the side sheet is on the wearer side starting from the base end portion. It has an upright portion that stands up in the lateral direction.
The upright portion is bent at the bent portion extending in the vertical direction, and the first upright portion extending from the base end portion to the bent portion and the first standing portion extending from the bent portion to the free end of the standing portion. A state in which a second standing portion located closer to the wearer's skin than the standing portion is included, and a plurality of leakage-proof cuff forming elastic members can be expanded and contracted in the vertical direction in the second standing portion. They are arranged side by side in the horizontal direction.
The leg cuff is configured to include the side sheet and a plurality of leg cuff forming elastic members arranged on the side sheet, and the plurality of leg cuff forming elastic members are laterally outside the base end portion. They are arranged side by side in the horizontal direction in a state where they can be expanded and contracted in the vertical direction.
When the vertical length of each of the leak-proof cuff and the leg cuff is defined as the vertical length of the cuff, and the vertical length of the cuff in the maximum extension state of both cuffs is 100.
The contraction stress per one of the leak-proof cuff forming elastic members of the second standing portion when the cuff vertical length is 70 is the leg cuff forming elasticity of the leg cuff when the cuff vertical length is 70. The contraction stress is smaller than the contraction stress per member, and the total contraction stress of the second upright portion when the cuff length is 70 is the total contraction stress of the leg cuff when the cuff length is 70. Absorbent article that is large compared to shrinkage stress. The ratio of the shrinkage stress per leg cuff forming elastic member having a cuff longitudinal length of 70 to the shrinkage stress per cuff longitudinal length of 70. The absorbent article according to claim 1, wherein the product is 0.2 or more and 0.99 or less. The ratio of the total contraction stress of the second upright portion when the length of the cuff is 70 to the total contraction stress of the leg cuff when the length of the cuff is 70 is more than 1 and 6 or less. The absorbent article according to claim 1 or 2. The absorbent article according to any one of claims 1 to 3, wherein the number of the elastic members for forming a leak-proof cuff in the second standing portion is larger than the number of elastic members for forming a leg cuff. The leakage-proof cuff of the second standing portion when the cuff vertical length is in the range of less than a specific value and when the cuff vertical length is in the range of 100 or less exceeding the specific value. The absorbent article according to any one of claims 1 to 4, wherein the magnitude relationship between the contraction stress per forming elastic member and the contraction stress per leg cuff forming elastic member of the leg cuff is different. The absorbent article according to claim 5, wherein the specific value is less than 70. Any one of claims 1 to 6, wherein the ratio of the diameter of the leak-proof cuff forming elastic member of the second standing portion to the diameter of the leg cuff forming elastic member is 0.2 or more and 0.9 or less. The absorbent article described in the section. When the length of the cuff in the vertical direction is 70, the contraction stress of the portion of the second standing portion corresponding to the innermost elastic member for forming a leak-proof cuff in the lateral direction is the said. Claims 1 to 7, wherein the contraction stress of the portion of the second upright portion corresponding to the portion of the plurality of elastic members for forming a leak-proof cuff that is located at the outermost position in the lateral direction is equal to or greater than the contraction stress. The absorbent article according to any one item. The plurality of leak-proof cuffs are formed in the second standing portion against the contraction stress of the portion of the plurality of elastic members for forming leak-proof cuffs in the second standing portion corresponding to those located at the outermost side in the lateral direction. The absorbent article according to claim 8, wherein the ratio of the contraction stress of the portion of the elastic member for which is located in the innermost part in the lateral direction is 1 or more and 3 or less.

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